Struct Func

pub struct Func<T>(/* private fields */);

A function value, this can be called with a set of positional arguments to produce a value. This is most commonly used as a constructor for tests sets.

Implementations

impl<T> Func<T>

pub fn new<F>(f: F) -> Self

where F: Fn(&Context<T>, &[Value<T>]) -> Result<Value<T>, Error> + 'static,

Create a new function with the given implementation.

pub fn call( &self, ctx: &Context<T>, args: &[Value<T>], ) -> Result<Value<T>, Error>

Call the given function with the given context and arguments.

impl<T> Func<T>

pub fn expect_no_args( id: &str, _ctx: &Context<T>, args: &[Value<T>], ) -> Result<(), Error>

Ensure there are no args.

pub fn expect_args_exact<V: TryFromValue<T> + Debug, const N: usize>( func: &str, _ctx: &Context<T>, args: &[Value<T>], ) -> Result<[V; N], Error>

where T: Clone,

Extract an exact number of values from the given arguments. Validates the types of all arguments.

pub fn expect_args_min<V: TryFromValue<T> + Debug, const N: usize>( func: &str, _ctx: &Context<T>, args: &[Value<T>], ) -> Result<([V; N], Vec<V>), Error>

where T: Clone,

Extract a variadic number of values with a minimum amount given arguments. Validates the types of all arguments.

Trait Implementations

impl<T: Clone> Clone for Func<T>

fn clone(&self) -> Func<T>

Returns a copy of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl<T> Debug for Func<T>

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl<T> From<Func<T>> for Value<T>

fn from(value: Func<T>) -> Self

Converts to this type from the input type.

impl<T> TryFromValue<T> for Func<T>

fn try_from_value(value: Value<T>) -> Result<Self, Error>